This is a custom wiring diagram for Graham Tiller – MY DAD 🙂
We have fitted a Tri-Spark electronic ignition to his bike.
We also fitted a 3 phase Lucas alternator – a nice choice for superior charging in modern traffic conditions.
We also fitted the superb Shindengen SH775 regulator/rectifier – it’s the only way i’d ever dream of fitting a lithium-based battery to a bike.
Talking of batteries, we went large!
We fitted a Shorai LFX36L3-BS12 (note this is a pre-MK3 battery tray, so the battery runs along the bike, not across it)
It is 36 Ah (or the lead acid equivalent) – but more importantly it has 540CCA (cold cranking amps)
It turns the engine over like the plugs aren’t in it!
We also fitted Colorado Norton Works handlebar switches (modified Honda units) because we fitted a Brembo brake master cylinder and ‘matching’ Magura clutch lever so were no longer bound to the original switchgear.
In lieu of the twin 6 volt coils, We have gone with the dual output single tower coil from Colorado Norton Works (it’s the brilliant Crane Cams unit) and looks much neater.
The final thing worth noting is the Charge Warning Light.
The nice thing about the Improving Classic Motorcycles unit is that you can retain the original warning light – so it looks totally factory.
It gives you a lot more useful information about the state of the battery and charging system compared to the standard assimilator unit, which looks for AC output from the alternator stator only.
Here’s the bike basking in the sunshine!
Here is the Wiring Diagram for Graham’s bike.
Custom Norton MK3 Commando Wiring Diagram – Graham Tiller PNG 3066×1841